End of life care
I worked for Sun at the time they died.
Shortly after, Oracle and I parted company, and I had to return my chunky Sun workstation. But first, remove all private ssh and pgp keys that had been used on it. Hack up a utility to zero a file before deleting it, and run with recursive find on sensitive directories. And on the whole of /home for good measure. Oh, yeah, better do /var/ as well. And ... did I ever put anything under /root/ ?
Of course it had been running zfs, so that wasn't enough. Ho, hum. Boot from another medium and zap the filesystem from low level with dd to the device; ship it back with a fresh bare-bones install on a repartition-and-newfs (which from memory was not OpenSolaris but FreeBSD - a minor exercise of the inner BOFH). Feel a low-level bereavement for the workstation. Now even if it falls into the hands of someone evil, I'm not a high-enough-value target to merit searching for the ghost of any residual data.